Engine-priming device



ENGINE DRIMING DEVICE Filed Oct, 5, 1919 T TO RNE Y Patented Ang. `'11,'.1925.

` UNITED/"STATES PATENT OFFICE.

SAMUEL r. WILBUR, orToLEno, OHIO, AssIeNOR, EY MEsNE ASSIGNMENTS, To THE ELECTRIC AUTO-LITE COMPANY, or TOLEDO, OHIO, A CORPORATION or OHIO.

`ENCalif.NE-PIRLIQIMIN'G- DEVICE.

. Application led'otober 3, 1919. JSerial No. 328,268.

To all whom-t may camera.:

yBe it known that I,.SAMUEL P. WILBUR, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements yin Engine-Priming` Devices,

clear, and exact description.

This invention relates to priming devices for internal Icombustion engines which normally operate on a fuel which is not readily vaporized when the engine is started and is cold. v l

Diiiiculty is oftenexperienced in starting internal combustion engines `when they are cold particularly those burning the less volatile fuels and to overcome this difliculty, it is common practice to provide a riming cup through which a more volatile nel may be admitted to produce a few initial impulses. A few drops of the priming fuel/are usually sguirted into the prlming cup from a small -o1l can or similar container and the engine immediately turned over by hand or other` 25 means.` r

automati ally drawn upon onlyI when starting the Ingme. 4 f Further objects of 't is invention relate' to economies of manufacture4 and details of con-` struction as will'lhereinafter appear from the .detailed description to follow. I accomplish the objects of my invention in one ity sta-nce by the devices and'means described-in the following specifications, but it' isfevident that the same may be varied widely witl1- out departing from the scope of the invention as pointed out in the appended'claims. A- structure constituting one embodiment of my invention, which may be thejpreferred,

forming a art thereof, in whlch: l The sing e figure of the drawing shows inv vertical cross section a portion'ofthe cylis illustrated in the accompanying" drawing several views. I of which I declare the following to be a full,

of m invention to avoidinder ofan internal combustion engine together with fuel supplying and vaporizing means therefor comprising my invention.

' In the drawing, -similar reference numerals refer to similar parts throughout the Referring tothe drawing, there is repre,- sented at 5 the upper portion of the cylinder of anengine of the Knight sleeve valve type having a piston 6 and sleeves 7 to control the entrance of fuel from t-he inlet `chamber 8 and the exit of the burned gases into the exhaust chamber 9. Connecting withlthe inlet chamber 8 is ,a tubular member 10 which comprises a horizontal portion 11 and a vertical portion 12. The horizont-al portion 411 hasv a passage therethrough in the form of two connecting truncated cones 14 and 15 forming what is commonly known as a Venturi tube. At the neck of the Venturi tube is a fuel inlet opening 17 controlled by an inlet valve 18 and connecting with a fuel pipe 19. This pipe extends down to a fuel tank 20 located in any convenient place, as for instance, in the base of the engine, a suitable ball valve 21 being shown closing the lower end of the tube. Between the horizontal and vertical portions of the tubular member 10 is a. choke valve 24 which is adapted to be operated to engage a valve seat 25. This valve is adapted to make a Somewhat loose lit witli'its seat,l to restrict the air intake rather than to completely close it ofi', theobjectbeing to increase the suction to more quickly draw the fuel up tO/the Venturi tube. The valve is carried by a stem 26 supported by a member 21 screw threaded intoV the tubular member .10v and is held in normal open position byy a light spring 28 between the member 27 and a push button 29.' The lower end of the vertical the engine c linder in order that the air drawn into t e engine shall be warmed by l the kheat radiated from the engine. This part of the structure has, however, beenpur-l y to avoid f unnecessary confusionlin illustrating the in posely omitted from the drawin ventiori.

tween the enginefand the choke yvalve seat or, if referred, may even connect directly with t e inlet chamber 8` of the engine. y

- With this apparatu's, the engine would be normally operated upon one ofthe less volatile fuels as for instance kerosene which lwould be contained in the tank 2() and be supplied to the engine through the `pipe 19 and controlling valve ,18. For starting the engine when it is cold #the small auxiliary tank 32 would fbe filled with some more volatile fuel as for instance gasoline, benried into the engine to zene, naptha or alcohol. -The. crank shaft of the engine-would be given a few `turns either by a hand crank or b y some suitable starting device and the choke. valve`24= Vheld closed. Since the fuel level in the auxiliary tank 32 is higher than that in tank 20, the more volatile fuel will reach the Venturi tube first and the vapor thereof will be carroducel the initial ex losions. As soon as t e engine has made a. ew revolutions, under its own power, the choke valve would be released by which time the operating fuel from tank 20-will have reached the engine and the engine will have developed sufficient heat to operate on the less volatile fuel.l By arranging the auxiliar fuel inlet 30 at one side of the neck of t e Venturi tube as shown, the suction under normal running conditions with the Iisochoke valve open is rnot suilicient to draw the auxiliary fuel' into the engine, so that as soonv as the engine is started and the choke valve ,is released, the auxiliary fuel falls to a level in the tube 31 below the o ening in the Venturi tube and remains t ere throughout the normal operation vof the engine. v

While I have described my invention in more or less detail andas being embodied in certain precise formI do not desire or intend to be limited thereto, as on the ,contrary, my invention contemplates broadly all proper changes, as well as the omission of immaterial elements and the substitution of equivalents therefor, as circumstances msy suggest or necessity render expedient. {aving thus described my inventionfwhat I claim as newr and desire to secure by Letters Patent, is:

1. In combination an internal combustion engine, means for suppl ingl fuel to said engine, means adapted to operated in starting said engine to augment the ow of said .fuel and means automatically operative to supply a different fuel when the said second means is actuated.

2. In 'combination an internal combustion engine, means for supplyinga" fuel Ito said engine, means foralso supplyinga lighter fuel to said engine and means operative 1n starting to restrict the air supply to said engine to cause said lighter fuel to reach said engine.. r

3. In combination, an internal combusengine, means for supplying a.' heavy fuel thereto, means for restricting the air intake` of said engine in starting, and means re- .sponsive to the operation of said restrictin' means for supplying a lighter fuel tofsai engine for starting purposes.

4. In combination an internal ,combustion engine having an inlet passage and a controlling valve therefor, means for suplying an operating fuel to said passage, and means `'independent of lsaid valve pendent upon vthe closure thereof for supplyin a priming fuel to said engine.

5. In combination an internal combustion engine, means for supplying to said engine a fuel rfor normal running, manually opoperated means for restricting the amount of air supplied to said engine on starting, means for supplying a more volatile fuel to said engine, said last means being constructed to be automatically operatlve in response to the operation of said restricting means. y

6. In combination an internal combustion engine, an airinlet passage for said engine, means for admitting lfuel to said passage, means for restricting the ow of air through said as'sage, means for admitting a more volatile fuel to said passage for y'starting the engine, said last means bein constructed to be operative only when said ow of'air is restricted.

7. In combination an internal combustion engine, an air inlet tube connected therewith including a Venturi tube, said Venturi tube having a fuel inlet openin at its neck portion and having another inlet opening for a more volatile fuel s aced from said neck portion and means or closing said' inlet tube beyond said openings.

8. In combination an internal combustion engine 'having an air inlet tube, a. Venturi tube forming a part Iof said tube and having a fuel inlet opening at its neck portion and having a second uel inlet opening at one side of the said neck portion, a fuel tank connecting with and below saidfirst -inlet opening, a second tank fora more volatile fuel connecting with andbelow said second fuel inlet but closer to said'Venturi tube than said first fueltank and a choke valve for `said airl inlet tube located beyond said Venturi tube whereby when said choke valve is closed in starting the engine, the more volatile fuel willirst reach the engine and its flow will discontinue when the choke valve is released.I

Leeeeee a@ 9; In eombnetiem en internal eombusspend earlier then said former means to e tion engine keuringen air inlet passage, suepredeermined Vsuction 'and means Qperetive tien controllee meene for supplying e fuel ign starting sei engine to increase the suele thereto for the normal opemion of seid emv MORO u f H: gine, suction eenrelled means for suppy f. eslmmy wml-'Sofa ax my Signa ing e lighter fuel for' stel-ting seid engine, me smd letter mesme being censtuete to xven SL E WLBUR 

